Sean Kenny, of Fitzroy Garden in Crystal Palace, was found guilty of a charge of exposure at Wimbledon Magistrates’ Court on May 9.
The court heard that on August 4 last year the 40-year-old exposed his genitals in the park intending that someone see them and be caused alarm or distress.
He also pleaded guilty to indecent behaviour at a police station as he masturbated while in a custody suite cell in Wandsworth on the same day.
Kenny also pleaded guilty to two counts of failing to surrender to court bail.
He will be sentenced at a later date.
